Yes - I did wonder about the legality of the software but the fact that it worked fine for 18 months seemed to indicate it was legal. The guy I bought it from still has his shop so I will take it back if it does cr@p out.
Interesting risk on the Win 10 license as well. I have just done a full back up just in case.I am familiar with Open office and assume that Libre office is the same. I never really liked the version of Word that I have (or maybe had). It's way too complicated for my needs so may switch anyway.